s-Triazine系除草剤の作用力に及ぼす環境要因の影響

概要

論文の詳細を見る
The effect of some external factors such as temperature and herbicide concentration of culture solution containing prometon (2-methoxy-4,6-bis(isopropylamino)-s-triazine), light- and solution-exposure time on the phytotoxicity of the herbicide to seedling of cucumber (Cucumis sativus L. ) was studied in a controlled environment growth chamber. Uptake of root-fed prometon was quantitatively assayed by counting. The phytotoxicity was increased as increased with all factors studied, being due to preceding prometon uptake by root. It was likely that, among these factors, the greatly affected was temperature, so that the remarkably great variation in plant injury at 26.7℃ and 16.7℃, as compared with the variation with 8×10^<-6>M and 4×l0^<-6>M of prometon concentration, was found. Regardless of environmental conditions studied, 50 percent growth reduction in cucumber was caused by absorption of 3.36×l0^<-3>mg of prometon per plant, reaching within 36 hours of solution exposure at high temperature. It was observed that a little loss of once absorbed compound from the plant back into solution occurred during dark period at low temperature. In a study of comparative phytotcxicity of six related s-triazine herbicides, it was shown that the phytotoxicity to cucumber was dependent on kind of substituted function group on the triazine ring; phytctcxicity was greater in the order of methylmercapto > chloro > methoxy in the 4 position and ethyl > isopropyl in the 2 position.
日本雑草学会の論文
1967-12-25

著者

茨木和典
九州農業試験場

s-Triazine系除草剤の作用力に及ぼす環境要因の影響

スポンサーリンク

概要

著者

関連論文

スポンサーリンク